Windshield wiper



P 1938. c. E. KINGSLEY WINDSHIELD WIPER Filed Sept. 7, 1957 2 Sheets-Sheet l aEmngsley By W lNVENT-' P 1933- c. E. KINGSLEY 2,130,957

WINDSHIELD WIPER Filed Sept. '7, 1957 2 Sheets-Sheet 2 k 1%? 1 aEffz'rzyszey ATTOR NEY Patented Sept. 20, 1938 UNITED STATES PATENT OFFICE 1 Claim.

The invention relates to windshield wipers for motor vehicles and has for the primary object the provision of a pneumatically actuated device of this character wherein the wiping elements 5 when in operation will maintain a substantially constant speed and will not be varied in speed by the varying loads on the engine of the motor vehicle and will have a rotating wiping action on the glass of the windshield to remove rain, snow and the like therefrom.

With these and other objects in view, this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a fragmentaryvertical' sectional 20 view showing a portion of a motor vehicle with a windshield wiper adapted thereto and constructed in accordance with this invention.

Figure 2 is a transverse sectional view showing the means of adjusting the wiping elements 25 into and out of operative position with respect to the windshield.

Figure 3 is a sectional view taken on the line 3-3 of Figure 2.

Figure 4 is a detail sectional view taken on the 30 line 4-4 of Figure 3.

Figure 5 is a detail sectional view taken on the line 5-5 of Figure 2.

Figure 6 is a detail sectionalview taken on the line 6-6 of Figure 2.

35 Figure 7 is a detail sectional view taken on the line 1-1 of Figure 1.

Referring in detail to the drawings, the numeral l indicates a part of a motor vehicle 2, the windshield of the latter, 3 the engine having 40 an endless belt 4 for driving the generator 5 'of the engine. The brief description of these parts of the engine is given for the purpose of setting forth clearly the application of my invention on the motor vehicle.

45 Mounted on the side of the engine 3 is a compressed air tank 6 to which is connected an air compressor 1. The compressor I is equipped with a clutch 8 including a pulley 9 engaged by the endless belt 4 and a shii'table element l engaged 50 by a pivotally mounted lever i i. A cylinder I2 is mounted on the tank 6 and has slidable therein a piston I3, the stem of which is pivotally connected to the lever II. The cylinder I2 is connected to the tank 6 by a pipe I! to permit the 66 air pressure within the tank to act on the piston i 3 for urging the piston in one direction. The piston is urged in an opposite direction by a spring 15. A spring pressed ball type catch l8 rides against the stem of the piston I 3 and said stem has a notch for the catch to engage. The catch engaging in the notch will hold the piston I3 against sliding movement under the influence of the air pressure until said air pressure reaches a predetermined amount. The air pressure then acts to shift the piston I3 to the left in Figure 1 and render the clutch 8 inoperative. When the piston I3 is urged in an opposite direction and permitted to move in said direction by a decrease in the amount of air pressure, the catch engages in the notch and the clutch 8 becomes inoperative so that the. compressor will be driven by the engine 3 to build up the air pressure in the tank 6.

A pipe I! is connected to the tank 8 and extends to a point adjacent the windshield 2 and has connected thereto oppositely extending m branch pipes l8 each including sections I9 and 20. The sections l9 and are rotatably connected, as shown at 2|, and the sections 20 of said pipes I 8 are connected to rotary air motors 22. The air motors are supported by the sections 20 of the pipes I 8 and include rotors 23 to which are connected wiper elements 24. The wiper elements contact the glass of the windshield. Exhaust ports 25 are provided for the air motors. A control valve 26 is located in the 30 pipe I! and has a handle 21 extending through the instrument board of the motor vehicle so that the operator can open and close the pipe i1. With the valve 26 in an open position air escapes from the tank 6 and acts upon the rotors thereby rotating the wiping elements. The wiping elements rotating against the glass of the windshield remove from said glass, rain, snow and the like.

Curved brackets 28 are secured to the motor vehicle adjacent the windshield and are slidably received in clips 29 secured to the sections 20 of the pipes l8. The brackets have a series of openings 30 and slidable pins 3i are carried by the clips to enter any of the openings whereby the wiping elements may be temporarily secured in various adjusted positions. The device when in use, the wiping elements are positioned as shown in full lines in Figure 2 with respect to the glass of the windshield. However, when the wiping elements are not desired, by releasing the pins 3i from the brackets 28 the wiping element and the sections 20 of the pipes l8 may be caused to assume dotted line position, as shown in Figure 2, thereby placing the wiping elements out of the range of vision of the driver of the motor vehicle.

A device of the character described is economical to maintain in operation and willeificiently clean the glass of the windshield and the speed of rotation of the wiping elements will be constant while in operation due to the fact that the air motors are driven from air pressure derived from a supply tank, the latter being replenished by the compressor driven by the engine the opposite end section of said second mentioned pipe and adapted to be rotatably actuated by pneumatic means functioning through said pipes, a squeegee connected to said motor for rotatio n thereby over the exterior face of said windshield to effect wiping 01' a predetermined area of the latter, a bracket adapted to be mounted on said motor vehicle adjacent said windshield and formed with an arcuate shaped upper portion fashioned with a plurality of spaced openings, a clip secured to said second mentioned pipe, and a pin slidably mounted in said clip and extending through one of said openings for maintaining said second mentioned pipe in adjusted position relative to said windshield, said pin operable for engagement with other of said openings whereby to adjust said squeegee for rotation over other areas of said face.

CARL E. KINGSLEY. 

